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City
of Cut Bank
Urban Forestry Advisory Board |
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Pruning
Tips |
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Construction |
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| Proper
tree care begins with selecting the right tree and planting it in the right
place. Trees are for a lifetime, so it pays to spend time now making sure
that your tree will thrive where you want to plant it. |
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| Find
a tree with the Arbor
Day Tree Wizard. This free online tool will help you narrow down your
choices and help you select the right tree for the right place. |
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Wrong
Trees, Wrong Places
Planting large
trees under utility lines can eventually mean mutilated trees
as they grow to maturity. Large evergreens close to the house
on the south block warming winter sunlight. No trees on the north
side of the house can leave it vulnerable to icy winter winds.
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Better
Choices
Short, flowering trees don’t
clash with overhead utility lines. Large deciduous trees on the
southeast, southwest, and west provide cooling shade in the summer,
but don’t obstruct the low winter sun. An evergreen windbreak
on the north blocks cold winds in winter.
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| Find
a tree with the Arbor
Day Tree Wizard. This free online tool will help you narrow down your
choices and help you select the right tree for the right place. |
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| Step 1—The
Tree’s Purpose: Start by defining the purpose for your new tree. Common
purposes include aesthetics, privacy, shade/energy reduction, windbreak,
or street tree. Your end goal will impact the suitability of different trees. |
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Step 2: Next
consider your planting site limitations, things to consider include:
- Hardiness
Zone: your location and weather have a tremendous impact on
what trees will grow.
- Height
and Spread of Mature Trees: Example overhead wires will limit
the height of mature tree and you will want to select a shorter tree.
The chart below is a great representation of the range of heights of
tree species.
- Sun
Exposure: The sun exposure in your planting area will greatly
affect how your tree grows.
- Soil
Conditions: Some trees can grow in only specific types of soil,
while others can grow in almost any condition the type of soil. Determining
what type of soil you have in your yard will help you find the right
tree.
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| Good
tree care starts with a healthy tree. Follow these tips and learn how to
buy a tree. |
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What
to Look for on Your New Tree |
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- Soil
plug should be moist and firm.
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Avoid tall, spindly tops. Well-developed roots are more important.
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- Root
ball should be firm to the touch, especially near the trunk.
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Root ball should be adequate for the tree’s size.
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- Pot
should not contain large, circling roots.
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Pruned roots cut cleanly, none wider than a finger.
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Soil & roots joined tightly.
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Some
Extra Things to Consider When Purchasing Mature Trees |
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| When
choosing trees for city plantings along streets and in parks, you will want
to trees with fairly substantial caliper (trunk diameter). |
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- Strong,
well-developed leader (or leaders in a multi-leader tree).
- Bright,
healthy bark.
- Trunk &
limbs free of insect or mechanical injury.
- Branches
well-distributed around trunk, considerably smaller caliper than trunk.
- Ideal spacing
between branches, at least 8–12" for most species.
- Good trunk
taper.
- Wide-angle
crotches for strength.
- Low branches—they
are temporary, but help develop taper, promote trunk caliper growth,
and prevent sun damage.
- After a
good start with good nursery stock, now it is time to learn how to plant
your tree.
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| While
planting each of these different types of trees differs in the details,
all trees eventually end up in a hole. But not any hole will do. |
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- The
most common mistake when planting a tree is a digging hole, which
is both too deep and too narrow. Too deep and the roots do not
have access to sufficient oxygen to ensure proper growth. Too
narrow and the root structure can not expand sufficiently to nourish
and properly anchor the tree.
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a general rule, trees should be transplanted no deeper than the
soil in which they were originally grown. The width of the hole
should be at least 3 times the diameter of the root ball or container
or the spread of the roots in the case of bare root trees. This
will provide the tree with enough worked earth for its root structure
to establish itself.
- When
digging in poorly drained clay soil, it is important to avoid
‘glazing’. Glazing occurs when the sides and bottom
of a hole become smoothed forming a barrier, through which water
has difficulty passing. To break up the glaze, use a fork to work
the bottom and drag the points along the sides of the completed
hole. Also, raising the centre bottom of the hole slightly higher
than the surrounding area. This allows water to disperse, reducing
the possibility of water pooling in the planting zone.
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Planting Bare-Rooted Trees |
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Planting
bare-rooted trees is a little different as there is no soil surrounding
the roots. Most importantly, the time between purchase and planting
is a more critical issue. Plant as soon as possible. When purchasing
bare-rooted trees, inspect the roots to ensure that they are moist
and have numerous lengths of fine root hairs (healthy). Care should
be taken to ensure that the roots are kept moist in the period between
purchase and planting. Prune broken or damaged roots but save as
much of the root structure as you can.
To plant,
first build a cone of earth in the centre of the hole around which
to splay the roots. Make sure that when properly seated on this
cone the tree is planted so that the ‘trunk flare’ is
clearly visible and the ‘crown’, where the roots and
top meet, is about two inches above the soil level. This is to allow
for natural settling. |
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Planting
Plugs or Balled and Burlapped Trees |
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| Balled
and burlapped (B & B) trees, although best planted as soon as
possible, can be stored for some time after purchase as long as the
ball is kept moist and the tree stored in a shady area. B &
B trees should always be lifted by the ball, never by the trunk.
The burlap surrounding the ball of earth and roots should either be
cut away completely (mandatory, in the case of synthetic or plastic
burlap) or at least pulled back from the top third of the ball (in
the case of natural burlap). Any string or twine should also be removed.
Backfill soil (combinations of peat moss, composted manure, topsoil,
etc.) is then placed in the hole surrounding the tree just to the
height of the ball or slightly lower to allow for some settling. Be
careful not to compress the back fill soil as this may prevent water
from reaching the roots and the roots from expanding beyond the ball. |
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| Planting
Container Trees |
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Container
trees (though subject to greater heat and drying conditions than
B and B) can also be stored for a brief period of time after purchase
as long as the soil in the container is kept moist and the tree
stored in a shady spot. The procedure for planting container trees
is similar to that for B & B trees. In the case of metal or
plastic containers, remove the container completely. In the case
of fibre containers, tear the sides away.
Once
carefully removed from the container, check the roots. If they are
tightly compressed or ‘potbound’, use your fingers or
a blunt instrument (to minimize root tearing) to carefully tease
the fine roots away from the tight mass and then spread the roots
prior to planting. In the case of extremely woody compacted roots,
it may be necessary to use a spade to open up the bottom half of
the root system. The root system is then pulled apart or ‘butterflied’
prior to planting. Loosening the root structure in this way is extremely
important in the case of container plants. Failure to do so may
result in the roots ‘girdling’ and killing the tree.
At the very least, the roots will have difficulty expanding beyond
the dimensions of the original container. To further assist this,
lightly break up even the soil outside the planting zone. This allows
roots that quickly move out of the planting zone to be more resilient
as they anchor into existing surrounding soil conditions.
Once
the tree is seated in the hole, the original soil is then back-filled
into the hole to the soil level of the container. Again, remember
not to overly compress the back-filled soil especially by tramping
it with your feet. Compress gently using your hands instead. |
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Importance
of Mulching
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| A newly
planted tree’s best friend is mulch. It is very important to remember
to mulch your tree after you have planted it. |
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Mulch
is a valuable for your trees health and care because *
Mulch
insulates the soil helping to provide a buffer from heat and cold
temperatures.
* Mulch
retains water helping to keep the roots moist.
* Mulch
keeps weeds out to help prevent root competition.
* Mulch
prevents soil compaction.
* Mulch
reduces lawn mower damage.
Steps
to Adding Mulch Around Your Tree
1.
Add mulch to the base of your tree by removing any grass within
a 3 to 10 foot area depending on the size of your tree.
2. Pour natural mulch such as wood chips or bark pieces 2 to 4
inches deep within the circle.
3. Keep the mulch from touching the trunk of the tree.
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| Tree
watering is a key part of tree care and it is difficult to recommend an
exact amount due to the varieties of climates. But a few rules of thumb
will help guide you to water your trees properly. |
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- Watering
Newly Planted Trees: For new trees, water immediately after
you plant a tree.
- Watering
Trees During First Two Years:
During the first couple growing seasons, your newly planted tree is
expending a lot of energy trying to get its roots established in the
soil. Especially during the first few summers of your new trees life,
it will have a difficult time dealing with heat and drought. You can
make this easier by providing water and covering the soil with wood-chip
mulch. Deep watering can help speed the root establishment. Deep water
consists of keeping the soil moist to a depth that includes all the
roots.
- How
Much Water and When:
Not enough water is harmful for the tree but too much water is bad as
well. Over-watering is a common tree care mistake. Please note that
moist is different than soggy, and you can judge this by feel. A damp
soil that dries for a short period will allow adequate oxygen to permeate
the soil.
- As a
rule of thumb your soil should be moist. Usually 30 seconds with
a steady stream of water from a garden hose w/ a diffuser nozzle
per tree seedlings is sufficient. Mulching is also key in retaining
moisture in the soil.
- You
can check soil moisture by using a garden trowel and inserting it
into the ground to a depth of 2”, and then move the blade
of the trowel back and forth to create a small narrow trench. Then
use your finger to touch the soil. If it is most to the touch, then
they do not need water.ut not any hole will do.
- Watering
Trees After the First Two Years: After your tree has been established
in your yard for two years the roots will be established. This will
allow your tree to withstand a wider range of water conditions including
on its own because it has a proper root structure.
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| Drought-Tolerant
Species: |
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These trees
are adapted to sites in their native habitat that regularly experience
prolonged dry spells. Although they are native to drought and are more
tolerant than others the first few years of life is critical to the survival
of the any tree and follow the steps above will help your trees grow.
* Thornless
Honeylocust (Zones 3 to 9)
* Mugo Pine (Zones 3 to 7)
* Arizona Cypress (Zones 7 to 9)
* Japanese Zelkova (Zones 5 to 8)
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High
Soil Moisture-Tolerant Species
On the opposite
side of the spectrum if your area deals with a large amount of moisture
or wet conditions here are a few trees that will do better in wet conditions.
* Red Maple
(Zones 3 to 9)
* Silver Maple (Zones 3 to 9)
* Paper Birch (Zones 2 to 7)
* River Birch (Zones 4 to 9)
* Swamp White Oak
* Baldcypress (Zones 4 to 10)
* Shellbark Hickory (Zones 5 to 8)
* Weeping Willow (Zones 6 to 8)
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